Application that crashed: kmail
Version of the application: 1.12.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-20-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
i was checking mail...
and applying my spam filter and... it crashes...

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
The current source language is "auto; currently c".
[KCrash Handler]
#5  0x00007f9e4202ae3c in KMFolder::folderType (this=<value optimized out>) at ../../kmail/kmfolder.cpp:276
#6  0x00007f9e42245f0d in KMail::ImapJob::slotProcessedSize (this=0x2b2b5d0, job=0xee60d0, processed=3374) at ../../kmail/imapjob.cpp:688
#7  0x00007f9e4224afe2 in KMail::ImapJob::qt_metacall (this=0x2b2b5d0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff6ca8d430) at ./imapjob.moc:90
#8  0x00007f9e40c87ddc in QMetaObject::activate (sender=0xee60d0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x7fff6ca8d428) at kernel/qobject.cpp:3113
#9  0x00007f9e429109bb in KJob::processedSize (this=0x313aac0, _t1=0xee60d0, _t2=3374) at ./kjob.moc:237
#10 0x00007f9e42911e12 in KJob::setProcessedAmount (this=<value optimized out>, unit=KJob::Bytes, amount=<value optimized out>) at ../../kdecore/jobs/kjob.cpp:264
#11 0x00007f9e3aa2ad0f in KIO::TransferJob::sendAsyncData (this=0xee60d0, dataForSlave=...) at ../../kio/kio/job.cpp:1023
#12 0x00007f9e3aa2c881 in KIO::TransferJob::slotDataReq (this=0xee60d0) at ../../kio/kio/job.cpp:1079
#13 0x00007f9e3aa2fba1 in KIO::TransferJob::qt_metacall (this=0xee60d0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff6ca8d6e0) at ./jobclasses.moc:345
#14 0x00007f9e40c87ddc in QMetaObject::activate (sender=0x30d17c0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x7fff6ca8d428) at kernel/qobject.cpp:3113
#15 0x00007f9e3aaf1b9d in KIO::SlaveInterface::dispatch (this=0x30d17c0, _cmd=101, rawdata=...) at ../../kio/kio/slaveinterface.cpp:166
#16 0x00007f9e3aaee333 in KIO::SlaveInterface::dispatch (this=0x30d17c0) at ../../kio/kio/slaveinterface.cpp:91
#17 0x00007f9e3aae114d in KIO::Slave::gotInput (this=0x30d17c0) at ../../kio/kio/slave.cpp:322
#18 0x00007f9e3aae326c in KIO::Slave::qt_metacall (this=0x30d17c0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff6ca8daa0) at ./slave.moc:76
#19 0x00007f9e40c87ddc in QMetaObject::activate (sender=0x2f86c70, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x7fff6ca8d428) at kernel/qobject.cpp:3113
#20 0x00007f9e3a9fdf57 in KIO::ConnectionPrivate::dequeue (this=0x2d8d6a0) at ../../kio/kio/connection.cpp:82
#21 0x00007f9e3a9fe07d in KIO::Connection::qt_metacall (this=0x2f86c70, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x2aefba0) at ./connection.moc:73
#22 0x00007f9e40c820f9 in QObject::event (this=0x2f86c70, e=0x294ef50) at kernel/qobject.cpp:1111
#23 0x00007f9e41105efc in QApplicationPrivate::notify_helper (this=0xb2adf0, receiver=0x2f86c70, e=0x294ef50) at kernel/qapplication.cpp:4056
#24 0x00007f9e4110d1ce in QApplication::notify (this=0x7fff6ca8e570, receiver=0x2f86c70, e=0x294ef50) at kernel/qapplication.cpp:4021
#25 0x00007f9e42ec8ab6 in KApplication::notify (this=0x7fff6ca8e570, receiver=0x2f86c70, event=0x294ef50) at ../../kdeui/kernel/kapplication.cpp:302
#26 0x00007f9e40c72c2c in QCoreApplication::notifyInternal (this=0x7fff6ca8e570, receiver=0x2f86c70, event=0x294ef50) at kernel/qcoreapplication.cpp:610
#27 0x00007f9e40c7380a in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0xac5d00) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#28 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0xac5d00) at kernel/qcoreapplication.cpp:1247
#29 0x00007f9e40c9b533 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#30 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:210
#31 0x00007f9e37f0cbce in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#32 0x00007f9e37f10598 in ?? () from /lib/libglib-2.0.so.0
#33 0x00007f9e37f106c0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#34 0x00007f9e40c9b1a6 in QEventDispatcherGlib::processEvents (this=0xac5930, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#35 0x00007f9e4119a4be in QGuiEventDispatcherGlib::processEvents (this=0x313aac0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#36 0x00007f9e40c71532 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#37 0x00007f9e40c71904 in QEventLoop::exec (this=0x7fff6ca8e3a0, flags=) at kernel/qeventloop.cpp:201
#38 0x00007f9e40c73ab9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#39 0x0000000000402fe9 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../kmail/main.cpp:146

Reported using DrKonqi